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usb_queue: Add some interrupt disabling around critical sections

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This commit is contained in:
Ben Gamari
2013-07-06 19:17:38 -04:00
parent 14526cd1c2
commit 36cf222ef4
1 changed files with 6 additions and 9 deletions
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15
firmware/hackrf_usb/usb_queue.c
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@ -25,6 +25,8 @@
#include <stddef.h>
#include <assert.h>
#include <libopencm3/cm3/cortex.h>
#include "usb.h"
#include "usb_queue.h"
@ -60,20 +62,16 @@ void usb_queue_init() {
static usb_transfer_t* allocate_transfer()
{
while (free_transfers == NULL);
//disable_irqs(); // FIXME
usb_transfer_t* const transfer = free_transfers;
free_transfers = transfer->next;
//enable_irqs();
return transfer;
}
/* Place a transfer in the free list */
static void free_transfer(usb_transfer_t* const transfer)
{
//disable_irqs(); // FIXME
transfer->next = free_transfers;
free_transfers = transfer;
//enable_irqs();
}
/* Add a transfer to the end of an endpoint's queue */
@ -82,7 +80,6 @@ static void endpoint_add_transfer(
usb_transfer_t* const transfer
) {
uint_fast8_t index = USB_ENDPOINT_INDEX(endpoint->address);
//FIXME disable_irqs();
transfer->next = NULL;
if (endpoint_transfers[index] != NULL) {
usb_transfer_t* t = endpoint_transfers[index];
@ -91,18 +88,18 @@ static void endpoint_add_transfer(
} else {
endpoint_transfers[index] = transfer;
}
//enable_irqs();
}
void usb_queue_flush_endpoint(const usb_endpoint_t* const endpoint)
{
uint_fast8_t index = USB_ENDPOINT_INDEX(endpoint->address);
//FIXME disable_irqs();
cc_disable_interrupts();
while (endpoint_transfers[index]) {
usb_transfer_t * transfer = endpoint_transfers[index];
endpoint_transfers[index] = transfer->next;
free_transfer(transfer);
}
cc_enable_interrupts();
}
void usb_transfer_schedule(
@ -135,7 +132,7 @@ void usb_transfer_schedule(
transfer->completion_cb = completion_cb;
transfer->endpoint = (usb_endpoint_t*) endpoint;
// TODO: disable_interrupts();
cc_disable_interrupts();
usb_transfer_t* tail = endpoint_transfers[index];
endpoint_add_transfer(endpoint, transfer);
if (tail == NULL) {
@ -146,7 +143,7 @@ void usb_transfer_schedule(
for (; tail->next != NULL; tail = tail->next);
usb_endpoint_schedule_append(endpoint, &tail->td, &transfer->td);
}
//enable_interrupts();
cc_enable_interrupts();
}
void usb_transfer_schedule_ack(